Headstock mechanism of lathes



W. E. WARD. HEADSTOCK MECHANISM OF LATHES.

APPLICATION FILED AUG.25, I9I9.

Patented Sept. 6,1921.

5 SHEETS-SHEET I.

I I I W. E. WARD. HEADSTOCK MECHANISM OF LATHES.

APPLICAUON FILED AUG.25,1919- Patented Sept. 6, 1921.

5 SHEETSSHEET 2- W. E. WARD. HEADSTOCKMECHANJSM 0F LATHES.

. APPLICATION FILED AUG.25| 1919- 1,389,919.

Patented Sept. 6, 1921.

5 SHEETS-SHEET 3.

W. E. WARD.

HEADSTOCK MECHANISM OF LATHES.

APPLICATION FILED AUG.25,1919- Patented Sept. 6, 1921.

5 SHEETS-SHEET 4.

W. E. WARD. HEADSTOCK MECHANISM OF LATHES.

APPLICATION FILED AUG.2.5, I919.

Patented Sept. 6, 1921.

5 SHEETS-SHEET 5.

UNITEDSTATES PE'ENT OFFICE.

WALLACE E. "WARD, OF ROCHESTER, NEW YORK, ASSIGNOR T0 ARTHUR H. INGLE, OF ROCHESTER, NEW YORK.

Specification of Letters Patent.

HEADS'I'OCK MECHANISM OF LATHES.

.Patonted Sept. 6, 1921.

To all whom it may concern:

Beit known that I, WALLACE E. WARD, a citizen of the United States, and resident of Rochester, county of Monroe, State of New York, have invented an Improvement in Headstock Mechanism of Lathes, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts in each of the several VIEWS.

V This invention relates to lathes for boring or turning uses and particularly to an improved arrangement and disposition of gear connections in the head block or headstock housing of the lathe. A principal object of the invention is to provide simplified and improved gear connections whereby an adequate range of speed changes from the drive shaft to the spindle and of feed changes to the feed shaft or screw, along with provision for rapid traverse of the feed shaft may be obtained by a minimum number of gear elements mounted on shaft centers arranged in a relatively compact manner so as to require a comparatively small head block or housing space. To these ends I utilize a pair of spaced apart constantly running and relatively high speed gears of the change speed system to the spindle, for deriving a rapid traverse movement to the feed shaft in either direction as may be required. 1 also preferablyoperate the feed shaft for feeding purposes by gear connections taken from the headstock spindle and with intercontrolled clutch devices whereby an interlock due to simultaneous connection of the feed and of the rapid traverse is prevented. The foregoing and other objects and advantages of the invention will more fully appear from the following'detailed description, and the distinctive features of novelty will be pointed out in the appended claims.

Referring to the drawings:

Figure 1 is a lengthwise vertical section throughthe head block housing of a lathe embodying the invention on the broken line 1-,1 of Fig. 2; I

Fig. 2 is an end view of the head block looking from the left in Fig. 1;

Fig. 3 is a transverse section on line 3-3 of Fig. 1; i p v Fig. 4 is a transverse section on line 4--4 of Fig. 1;

Fig. 5 is a transverse section on line 55 of Fig. 1;

Fig. 6 is a sectional diagram illustrating the interconnection of the two clutch devices to the rapid traverse and feed respectively for mutual control, this being taken on line 66 of Fig. 1; and

Fig. 7 is a lengthwise sectional diagram of the operating mechanism of the head block complete.

10 indicates the head block or headstock housing of the lathe and in this is journaled a spindle 11 on which is fitted a face plate 12 in usual manner having an inwardly extending peripheral flange bearing an internal gear 13 which is engaged by a pinion 14 to drive the face plate. The pinion 14; is fixed at the end of a short shaft 15 journaled in the housing and having keyed thereon within the housing a gear 16 which is engaged for driving by a pinion 17 fixed onv a shaft 18 extending across the housing and with its ends journaled therein. The shaft 18 has loosely mounted thereon spaced apart gears 19, 20 of diverse sizes. The gears 19, 20 have formed on the inner sides of the hubs thereof facin'g each other clutch faces 19 20 respectively which are engageable by cooperative clutch faces formed at the opposite ends of a clutch sleeve 21 slidably keyed on the shaft 18 between the gears 19, 20 and having integral or rigid therewith a gear 21. 22 is a high speed shaft, that may be as shown the prime drive shaft of the machine equipped with a driving pulley 23 at its outer projecting end. This shaft is, as shown, journaled in the housing in endwise alinement with the shaft 15, the inner abutting ends of boththese shafts being journaled in a bearing web 10 of the housing. The shaft 22 has keyed thereon three spaced apart pinions 21, 25, 26 of diverse sizes with the intermediate one 25 thereof the largest.

The pinions 2 1, 26 are constantly in mesh with the gears 19, 20, respectively, while the pinion 25 is in mesh with the gear 21 in an intermediate position thereof, while upon the shifting of the hub 21" of said gear to either limit of its movement it is disengaged from the pinion 25 and the clutch face thereof engaged with either the clutch face 19 or 20 to connect the gear 19 or the gear 20 to drive the shaft 18; thus attaining a range of three speed changes from the driving shaft 22 to the face plate. Journaled in the housing, adjacent to and parallel with the shaft 18 is a shaft 27, this shaft being preferably and as shown transversely central of the head block and in endwise alinement with the feed shaft 28 to which it iscoupled by a suitable coupling 29. The shaft 27 has loosely mounted thereon spaced apart pinions 30, 31 constantly driven by the gears 19, 20 respectively, the pinion 30 being for thispurpose geared direct with the gear 19 while the pinion 31 is driven in reverse direction from the gear 20 through" an intermediate gear 32 loosely mounted on a shaft 33 j ournaled in the housing and later further described. The pinions 30, 31 are adapted to be selectively engaged with the shaft 27 to drive the same by means of an intermediate double ended clutch 34 which may be of any suitable type, the well known Carlyle-Johnson clutch being well suited for this purpose. This clutch in an intermediate position leaves both of the pinions 30, 31 disconnected from the shaft 27 so that said shaft is free to be driven from the feed gear gagement with the clutch face 35 when the machines is to be connected for feeding purposes. The gears 36, 37, 38 are selectively engageable by the several pinion elements 40, 41, 42 of a pinion block that is slidably keyed on the shaft 33, the spacing of these pinions with respect to the gears 36, 37, 38 being such that the larger intermediate pinion 41 will be disengaged from the gear 37 before the pinion 40 or 42 would come into engagement with its cooperative gear 36 or 38 respectively. The shaft 33 has fixed at the outer projecting end thereof a gear 43 which is driven from a pinion 44 fixed on the inner end of the spindle at a relativel reduced rate. It is essential that the clutches 34, 39 be not moved into operative engagement at the same time as this would result in an interlock between the rapid traverse and the-feed connections. Various devices may be employed for this purpose and for illustrative purposes I show the rocker connections 34 39 to the respective clutches as having rigid therewith depending arms 45, 46 respectively. The end of these arms havepivoted thereto bars 47, 48 respectively which extend adjacent each other in parallelism. These bars are formed with V- notches 47, 48 respectively which'notches are opposite each other when the clutches are both inneutral position. Between these notches a ball 49 is guided to slide transversely in a suitable mounting, the dimension of this ball being such that when it is pressed into the notch of either bar 47 or 48, the other bar is permitted to slide so that its clutch may be moved out of neutral and into operative position, the face of such bar then engaging the ball to prevent from moving out of the notch of theother bar and hence holding said other bar in neutral position. With the described connections the number of gears required is reduced to minimum and with a most compact disposition, this resulting partly from the employment of the change speed gears 19, 20'

to operate a rapid traverse 5 in either direction by means of the pinions 30, 31 on the shaft 27 endwise alined with the feed shaft. By virtue of this connection and also by having both the feed change gears 36, 3'7, 38 and the rapid traverse pinions 30,

all on the shaft 27 which may be considered a continuation of the feed shaft, it is rendered practicable and convenient to lo cate the feed shaft in the transverse center of the base of the head block which contributes to efficiency and balanced operation. T am aware-that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

Having described my invention, what I claim as new and desire to secure by Letters .Patent is: 7

p 1. Headstock'mechanism oflathes, comprising a high'spe'ed drive shaft, a work spindle, change speed gearing connecting said shaft with said spindle including a pair 1 of spaced apart constantly driven gears, a' feed shaft having an'extension axially alined therewith, connections for driving said shaft extension in either direction y 111g a disconnecting clutch, and feed mechanism connected to be driven from said spindle including a set of feed change gears loosely mounted on said feed shaft extension and including a disconnecting clutch.

2. Headstock mechanism of lathes, comprising a high speed drive shaft, a work spindle, change speed gearing connecting said shaft with said spindle including a pair of spaced apart constantly driven gears, a feed "shaft having an extension axially alined therewith, connections for driving said shaft extension in either direction from said constantly driven gears including from said constantly driven'gears includa disconnecting clutch, feed mechanism connected to be driven from said spindle including a set of feed change gears loosely mounted on said feed shaft extension and including a disconnecting clutch, and means for preventing both of said clutches from being moved into operative position at the same time.

3. Headstock mechanism of lathes, comprising a high speed drive shaft, a Work spindle, change speed gearing connecting said drive shaft and said spindle, including a pair of spaced apart constantly driven gears, a feed shaft having an extension in the head block axially alined therewith, a pair of spaced apart pinions connected to be driven in opposite directions by said constantly driven gears and equipped with a clutch to selectively engage either of them with said shaft extension, a countershaft mounted adjacent said shaft extension and connected to be driven from said spindle, and change feed gearing from said countershaft to said shaft extension including a disconnecting clutch.

4. Apparatus of the kind described, comprising a drive shaft, a Work spindle, change speed gearing connecting said shaft with said spindle including a pair of spaced apart constantly running gears, a feed shaft, a shaft adapted to be connected to actuate the same having loosely mounted thereon pinions connected to be driven in reverse directions from said constantly driven gears and having a clutch for selective engagement thereof with said shaft, said shaft also having a set of change feed gears loosely mounted thereon With a clutch for engaging the same therewith, a countershaft connected to receive feed movement, and means for connecting said shaft selectively with said change feed gears.

5. Apparatus of the kind described, comprising a high speed drive shaft, a work spindle, change speed gearing connecting said shaft with said spindle including a pair of spaced apart constantly driven gears, a feed transmitting shaft equipped with means to receive rapid traverse movement in opposite directions from said constantly driven gears and having also mounted thereon change feed gears with means for clutching the same thereto, and means for transmitting impulse from said spindle to said change feed gears selectively.

6. Apparatus of the kind described, comprising a high speed drive shaft, a work spindle, change speed gearing connecting said shaft with said spindle including a pair of spaced apart constantly driven gears, a feed transmitting shaft equipped with a pair of spaced apart pinions connected to be driven in opposite directions from said constantly driven gears, a clutch for selectively connecting said pinions with said shaft, said shaft having also loosely mounted thereon a set of spaced apart change feed gears with a clutch for engaging the same thereto, a countershaft connected to be driven from said spindle equipped with means to engage the same selectively with said fee-d gears, and means interconnecting said clutches for mutual control and preventing more than one thereof from occupying an operative position at the same time.

In testimony whereof I have signed my name to this specification.

WVALLACE E. WARD. 

